Accidentally made a partial wireframe. Does anyone know a fix?
You have deleted the edges.


  [Delete Edges] Deletes any edges in the current selection. Removes any faces that the edge shares with it.


As you can read in the manual entry, the adjacent faces are removed.

You probably want to dissolve the edges, since this will retain the faces.


  [Dissolve Edges] Removes edges sharing two faces (joining those faces).


However, since you have already deleted the edges you will have extra vertices between to adjacent edges. This would have not happened with the dissolve operation.

You can box select B the vertices. Then dissolve them X > Dissolve Vertices. After that you recreate the faces by selecting all A and filling with F.